Write a C program that calculates the average of an array of $10$ floating$-$point values. The values are

$\{1\mathrm{.}5,2\mathrm{.}5,3\mathrm{.}5,6\mathrm{.}5,8\mathrm{.}3,5\mathrm{.}3,9\mathrm{.}2,7\mathrm{.}6,5\mathrm{.}6,8\mathrm{.}8\}$